perthite

[ pur-thahyt ]

noun

, Mineralogy.

1. a variety of feldspar containing irregular bands of albite in microcline.

Other Words From

• per·thit·ic [per-, thit, -ik], adjective
• per·thiti·cal·ly adverb

Word History and Origins

Origin of perthite¹

1832; named after Perth, Ontario, Canada; -ite ¹

Example Sentences

Among the assortment were garnets from the Stikine River and also from the Province of Quebec; amethysts from Thunder Bay; labradorite, finest in the world, from the Isle of St. Paul; spinel from Ottawa County, Quebec; sodalite from British Columbia; pitanite, Litchfield, Quebec; lercon and perthite from Quebec; sunstone and lebra stone from Perth, Ontario, and crown sunstone from Renfrew County, Ontario.

From Project Gutenberg